打开网站时被一个框架网页置换
大家来看看这算是怎没回事，打开某些网站时随机变成这个
<html><HEAD><TITLE></TITLE>
<META http-equiv=Pragma content=no-cache>
<SCRIPT language=JavaScript>try{var tmp=parent.window.
location.href}catch(e){window.
location.reload();}</SCRIPT>
</HEAD><FRAMESET border=0 frameSpacing=0 rows=*,0 frameBorder=0
onload="window.lxmainframe.
location='http://ad4.sina.com.cn/sina/ziguang/yunnan/frame.html?url='+window.
location;"><FRAME name=lxmainframe src="
about:blank"><FRAME name=lxblankframe src="
about:blank" scrolling=no></FRAMESET></html>
